Question
A man can swim at the rate of 5 km/hr in still water. If
the speed of the water is 2 km/hr, then the time taken by him to swim 18 km upstream isSolution
Rate upstream = 5 – 2 = 3 km/hr Distance upstream = 18 km  Hence, required time = distance/speed = 18/3 = 6 hours Â
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